Antigraft investigators questioned a corporate manager on Tuesday (05/12) as a witness in a bribery scandal surrounding the purchase of aircraft engines for Garuda Indonesia that has seen the national flag carrier's then-chief executive named as a suspect in the ongoing investigation. (Reuters Photo/Beawiharta)

Jakarta. Antigraft investigators questioned a corporate manager on Tuesday (05/12) as a witness in a bribery scandal surrounding the purchase of aircraft engines for Garuda Indonesia that has seen the national flag carrier's then-chief executive named as a suspect in the ongoing investigation.

Diversified business group Mugi Rekso Abadi senior manager Sallyawati Rahardja was summoned to testify against the group's founder, Soetikno Soedarjo.

Soetikno has also been named a suspect and was the alleged middleman connecting Garuda with British engineering firm Rolls-Royce, which allegedly bribed then-Garuda chief executive Emirsyah Satar.

Tuesday's questioning was the third for Sallyawati as a witness in the case, which commenced at the Corruption Eradication Commission (KPK) earlier this year.

"The witness is deemed by investigators as possibly having the information needed," KPK spokesman Priharsa Nugraha said at his office in South Jakarta, declining to elaborate.